[Ultrasonic tissue characterization in diagnosing myocardial infarction]
Y Sakabe1, H Hishida, K Kawamura
1Department of Internal Medicine, Fujita-Gakuen Health University School of Medicine, Toyoake.
Journal of Cardiography. Supplement
|January 1, 1987
Summary
Two-dimensional echocardiography can detect changes in myocardial tissue due to ischemia and infarction. Increased echo intensity in myocardial infarction patients and acute ischemia suggests collagen changes, aiding ultrasound tissue characterization.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Imaging
Context:
- Myocardial infarction (MI) and ischemia alter heart tissue structure.
- Assessing these changes non-invasively is crucial for diagnosis and management.
- Traditional echocardiography may not fully capture subtle tissue alterations.
Purpose:
- To evaluate myocardial tissue changes using quantitative two-dimensional (2D) echocardiography.
- To assess echo intensity variations in acute and chronic myocardial infarction and ischemia.
- To explore the potential of ultrasonic tissue characterization for detecting myocardial conditions.
Summary:
- Quantitative analysis of 2D echocardiograms revealed increased echo intensity in patients with old myocardial infarction compared to normal subjects.
- In acute myocardial infarction, echo intensity increased significantly after two weeks, correlating with collagen fiber content.
- Acute myocardial ischemia in dogs showed decreased echo intensity with a 5 MHz transducer, which normalized over time, suggesting frequency-dependent ultrasound properties.
Impact:
- Demonstrates that myocardial ischemia and infarction influence ultrasound transmission and reflection.
- Highlights the potential of quantitative echocardiography and ultrasonic tissue characterization for improved detection of myocardial ischemia.
- Suggests future applications in non-invasive cardiac diagnostics.
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